JPS5897631A - Temperature distribution detecting sensor - Google Patents

Abstract

PURPOSE:To detect a temperature distribution in a specific direction in a body, e.g. the refractory wall of a melting furnace, etc., with high precision by welding plural columnar insulators with pressure and containing them in an armor sheath, embedding an even number of thermocouple wires, and short-circuiting every couple of thermocouple wires electrically. CONSTITUTION:A columnar glass insulator 3 has an even number of and >=4 axially piercing holes 6 and while those insulators 3 are arranged in series, one sheet of metallic foil 4 having two through holes is interposed between the insulators 3. Then, thermocouple wires 2 and 2' are run through the through holes and in this case, sheets of metallic foil 4 where the thermocouple wires 2 and 2' are passed are arranged at different positions in a circumferential direction. Therefore, the thermocouple wires 2 and 2' each piece only one sheet of metallic foil 4 lengthwise and those sheets of metallic foil 4 are held at different positions in the circumferential direction. A recessed part 7 is an arrangement seat for the metallic foil 4, but the metallic foil 4 is very thin in general, so the formation of the recessed part 7 may be omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for determining the tjA degree distribution in a specific direction inside an object, for example, inside a fireproof wall of a melting furnace, melting furnace, scouring furnace, heating furnace, etc. This relates to a sensor for detecting Kfi once.

The furnace wall of the above-mentioned nine types of high heat/high temperature furnaces is on the inner surface of the iron shell.
(However, wear and tear due to continuous use over many years is unavoidable.) Detection of the remaining amount of fireproof walls is
This is an essential management item for operations. However, since the inside of the furnace body as described above cannot be directly observed during operation, it is not possible to know the internal condition or the degree of wear and tear on the walls. Therefore, it is thought that it is necessary to embed a temperature distribution detection sensor in the wall surface and collect the above-mentioned knowledge based on the temperature information from the dragon. A reference point type thermometer made by V-S described in No. 8870 is known. coar
The s body is stored in a storage tube so that the thermocouples made of multiple @ Weld the wire and finally (
It is manufactured by reducing the diameter of a protection tube. Shikarukuko0@Nuretai has the following drawbacks.9.

(D Because the wire material to be added acts as a good heat conductor,
A short circuit is formed in the longitudinal direction of the heat flow, and
decreases.

■Since the shape of the above wire is unspecified, the ## surface configuration of the sensor varies in the length direction, and the humidity measurement conditions are not constant.

Since a considerable amount of space is left inside the surface protection sIg, ■ Deterioration of temperature measurement accuracy due to convection of residual air ■ Oxidation of the sheath material due to wcVC at high temperatures ■ Damage to the sheath material due to intrusion of fluid in the furnace when the protection tube is broken. There are problems such as erosion and damage, and difficulty in positioning the sheath materials relative to each other.

(Capital) Because the thermocouple material and the additional wire material are different types, the f
Disconnection easily occurs at the f# junction of dissimilar metals during multi-processing.

(V) During welding, the vicinity of the temperature-sensing part is heated to just above the melting point of the material, which may sometimes lead to a decrease in thermoelectric power, leading to a deterioration in temperature measurement accuracy.

Therefore, the inventors of the present invention have made repeated studies to overcome these shortcomings, and have first developed a method to overcome these drawbacks. An excellent sensor was developed as 5IS-166140. The proposed sensor uses a dummy made of the same material as the V-type thermocouple, instead of the additional wires, and holds each wire in a non-contact manner by filling the insulation pipe with a holder. There are nine of them. In other words, each cross section of the longitudinal force is in an equivalent situation from a geometrical and thermal perspective, and since there is no residual static electricity in the storage, the above (I) to @D
All shortcomings have been resolved. On the other hand, the disadvantage of the welding method (compared to this method) is that although it was a significant improvement because the same material was welded,
However, it was not a complete solution, and the shortcomings of (Ma) remained unresolved.

The present invention has been made by paying attention to such circumstances, and not only does it have the drawbacks of (D-■) above, but also (capital) and (V).
By solving the shortcomings of the above, further research was carried out with the aim of unifying temperature measurement conditions, ensuring temperature measurement accuracy, improving durability, and preventing defective products during manufacturing, etc., and the invention was finally completed.

In other words, the sensor according to the present invention uses, instead of the above-mentioned welding,
Long thermocouple wires are embedded in the insulator in the longitudinal direction from the beginning, and the temperature sensing portion is formed by electrically shorting each pair of thermocouple wires using conductive metal foil. Therefore, the above (
Once all of the drawbacks I) to (m) have been eliminated, the accuracy of temperature distribution detection within the refractory wall in the above-mentioned high-temperature furnace has been greatly improved.

The configuration and effects of the present invention will be cut out in the following example drawings, but for ease of understanding, the drawings will be cut out along the manufacturing procedure. Therefore, the technical scope of the present invention is as follows:
i! It is not something that can be interpreted limitedly by Akira, but rather
All design considerations that do not contradict the spirit described below are included within the scope of the present invention.

Figures 1 to 4 are perspective views showing the manufacturing procedure, and Figure 5 is a perspective explanatory view showing the inside of the product partially (cut out). 8 shows a pair of thermocouple wires exhibiting a thermoelectric effect, 8 shows an insulating material, and 4Fi metal pongee. Figures 1 to 4 show an example of I!l construction using six thermocouple wires,
! Figure 5 shows examples of products in which 12 thermocouple wires (however, only 6 are shown in the figure) are embedded.

First, in Fig. 1, a columnar insulating material (hereinafter referred to as an insulator) 8 is formed with 4 or more even-numbered insulators 8 that penetrate in the axial direction. The metal 11i is arranged in series and has two Tetsutsu holes formed therein.
One i4 is inserted between each insulator 8. Then, pass the thermocouple element 11j12,2' through the above-mentioned through hole, but be careful to align the pupils at different positions when looking at the shoulder direction of the metal foil 4#i through which the thermocouple element 11j12,2' is to be inserted. do. As a result, the thermocouple wire 2.degree. 2' passes through the metal foil 4 only once, viewed in the longitudinal direction), and the metal foil 4 is held in different positions, viewed in the circumferential direction. Note that the recess 7 is a seat for arranging the metal foil 4, but since the metal foil 4#-i is generally very large in diameter, the formation of the recess 7 may be omitted. The material for the metal foil 4 should be one with good conductivity, since the thermocouples 112 and 2' are electrically short-circuited to form a temperature sensing section.
Desirable examples include platinum, gold, silver, and copper. Also, the material of the insulator 8 should maintain the above-mentioned insulation properties, but? When used in ultra-high temperature furnaces such as f& furnaces and rotary φ furnaces, use magnetic V-type, V-rica/alumina yarn, alumina yarn, *chemical type.

Various shelf refractories such as nitride type and mixed type are preferred.
The use of refractories not only guarantees the X-resistance of the thermocouple wire, but also reduces heat transfer in the length direction within the sensor, making it possible to accurately measure the temperature distribution in the length direction. can.

The insertion of the thermocouple plan 112, 2' is completed and the nine insulators 8 are the second
As shown in the figure, after being stacked in the longitudinal direction and filled into the mantle V-tube 1, the product shown in Figure 4 is obtained by reducing the diameter by swaging or wire drawing as shown in Figure 11g8. Since the through hole 6 of the insulator 80 becomes thinner by diameter reduction processing, the thermocouple element wire 2゜2' is fixed, and the metal wire 2゜2' is fixed. I4 and the thermocouple element wire λ2' are pressed together to form a temperature-sensing section, and each temperature-sensing section 4' is formed at nine different positions in the length direction, as shown in FIG. Therefore, by inserting the manufactured sensor in the wall thickness direction of the fireproof wall, the humidity in the wall thickness direction can be independently detected by each temperature sensing part 4', and accurate temperature distribution can be measured. *For the same reason as choosing a refractory as the insulator 1, if the material of the mantle tube 1 is made of a material with low thermal conductivity and is made of thin-walled VC cedar, there will be even less thermoelectric input in the longitudinal direction as a sensor. (This will greatly improve the accuracy of measuring temperature distribution, but if corrosion resistance is also considered, it is recommended to use stainless steel, insnel, etc.)

As explained above, the temperature distribution sensor is
will be manufactured, but supplementary explanation will be added below, including a slight variation 1.

Since the insulators 8 are made thinner through cost reduction processing and are inserted and stretched in the length direction, adjacent insulators 8 are bonded to each other by diffusion pressure and become an integral insulating material, but the quality of the insulators varies depending on the quality of the integrity.
Since there is no difference in the function, either case is included in the present invention.

In addition, in FIG. 1, metal foils 4 are interposed on each opposing surface of the insulator 8, and in FIG. 9 shows the same example, but as long as you understand and ignore even the 1st place of the temperature sensing part, you can use any interval, and Jll group part 1ilII in the sensor
Fi is optional, as shown in Fig. 2 (forming a temperature sensing part at the leading edge is also included in the present invention. There is a strong relationship between the
defects have been largely eliminated, and the mutual position of the thermocouple wires has been improved.
The relationship is maintained firmly and the integrity of the sensor is improved. The thickness of the Ha metal foil should be determined in advance by considering the area reduction rate; if the area reduction rate is large, it is desirable to make it slightly thinner. The thermocouple wire exposed at the bottom left @Ktl of the vg4 diagram is used for connection with the compensation wire.

Since the temperature distribution detection sensor of the present invention is configured as described above, the following effects can be obtained.

(1) Since the cross-sectional configuration of the sensor is all the same in the length direction, the temperature conditions at each temperature sensing part are the same.

(2) Heat transfer in the length direction is small, and temperature distribution can be measured with high accuracy.

(3) Since the thermocouple element wire Fi is not welded and is made of the same material and has the same shape when viewed in the length direction, there is no risk of wire breakage during diameter reduction processing, etc.

(4) Near the temperature sensing part @-1) Since it is not heated by X welding, there is no adverse effect on temperature measurement accuracy.

The amount of residual static electricity in the fll+1 sensor is extremely small, and it is possible to prevent a drop in temperature measurement accuracy due to gas vs.

16) Not limited to the temperature distribution inside large φ wall-resistant objects, but also directly inserted into liquids, gases, etc. a! It can also be used for the purpose of performing fIJA determination of frequency distribution.

[Brief explanation of drawings]

Figures 1 to 4 are perspective views showing the manufacturing means of the temperature distribution detection sensor according to the present invention, and Figure 4 is a perspective view of the finished product in light color. 1...Outer sheath etc. 2.2'-...Thermocouple snow-covered body...Insulator (insulator) 4...Metal foil 4'...S hot part

Claims (1)

[Claims] A plurality of columnar insulators are integrally press-welded in the longitudinal direction within the +11 jacket V-space tube, and an even number of 4 or more columnar insulators are applied to each of the insulators in the longitudinal direction. The thermocouple l! is buried so as to penetrate continuously, and the thermocouple l! A temperature distribution detection sensor characterized by interposing a conductive metal foil that electrically shorts each pair of wires.